Agias Marinas church is located on the east side of Frenaros village. It’s near the churches of Agios Andronikos and Agias Athanasias. It is a small temple dating from the late 15th century to the beginning of the 16th century. The church is built with square stones.
Inside of the church threre is only a few icons and one of them is Agias Marinas icon. At first the church was decorated with murals, most influenced by the Italian style, but most of them have been destroyed over the years.
Agias Marinas name day is on the 17th of July. All the villagers, celebrate their saint and have feasts with family and relatives.